121210102111 has 8 divisors (see below), whose sum is σ = 138560330880. Its totient is φ = 103868498328.

The previous prime is 121210102109. The next prime is 121210102129. The reversal of 121210102111 is 111201012121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121210102111 - 2¹ = 121210102109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121210102091 and 121210102100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121210102141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2126101 + ... + 2182366.

It is an arithmetic number, because the mean of its divisors is an integer number (17320041360).

Almost surely, 2^121210102111 is an apocalyptic number.

121210102111 is a deficient number, since it is larger than the sum of its proper divisors (17350228769).

121210102111 is an equidigital number, since it uses as much as digits as its factorization.

121210102111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4312493.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121210102111 its reverse (111201012121), we get a palindrome (232411114232).

The spelling of 121210102111 in words is "one hundred twenty-one billion, two hundred ten million, one hundred two thousand, one hundred eleven".